Conclusions and RelevanceWe found that USNWR top-ranked hospitals for cardiovascular care had lower 30-day mortality rates for AMI, HF, and CABG and higher patient satisfaction ratings compared with nonranked hospitals. However, 30-day readmission rates were either similar (for AMI and CABG) or higher (for HF) at top-ranked compared with nonranked hospitals. This discrepancy between readmissions and other performance measures raises concern that readmissions may not be an adequate metric of hospital care quality.